Fix weak_ptr's operator* implementation.

base/memory/weak_ptr.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Weak pointers help in cases where you have many objects referring back to a
 // shared object and you wish for the lifetime of the shared object to not be
 // bound to the lifetime of the referrers.  In other words, this is useful when
 // reference counting is not a good fit.
 //
 // Thread-safety notes:
@@ skipping 155 matching lines @@
   // Allow conversion from U to T provided U "is a" T.
   template <typename U>
   WeakPtr(const WeakPtr<U>& other) : WeakPtrBase(other), ptr_(other.get()) {
   }
 
   T* get() const { return ref_.is_valid() ? ptr_ : NULL; }
   operator T*() const { return get(); }
 
   T* operator*() const {
     DCHECK(get() != NULL);
-    return *get();
+    return get();
   }
   T* operator->() const {
     DCHECK(get() != NULL);
     return get();
   }
 
   void reset() {
     ref_ = internal::WeakReference();
     ptr_ = NULL;
   }
@@ skipping 66 matching lines @@
 
  private:
   internal::WeakReferenceOwner weak_reference_owner_;
   T* ptr_;
   DISALLOW_IMPLICIT_CONSTRUCTORS(WeakPtrFactory);
 };
 
 }  // namespace base
 
 #endif  // BASE_MEMORY_WEAK_PTR_H_